I want to remove the tail shaft extension on my 90 chevy TH4L60E700R4 transmission and replace the bushing and seals. I have several questions. After removing the electrical connection to the speedometer drive, will I have to remove it before removing the tail shaft extension? After removing the tailshaft seal, does it matter which side I drive the bushing out and the new one in from? I would assume I can drive out the old and drive in the new bushing from the oil seal side? I have only worked on cable drive speedo's and do not know what to expect with the electronic one on my transmission which is why I am asking if the speedo drive needs to be pulled out before the tail shaft ext. can be removed. Any pics or directions on all of this would be greatly appreciated. Thank you for any help with this.

I'm not sure either. If it's the Gear driven Speed Sensor it would be just like normal mechanical speedo gears. Not sure about the Reluctor & Pickup type.
This tool will remove and install the Bushing without removing the Tailhousing. Just have to remove the DriveShaft. http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT works on most any Trans. Also works as a Output Shaft support tool for checking endplay when rebuilding. Very easy to use & works great.

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